hdu 5035 指数概率分布+积分

代码很好写,下面有我自己写的代码,上面的解析实在太详细,比我自己证的好看的多,就借用一下了,

转载自:解析转载处

#include <iostream>#include <cstdio>#include <cstring>#include <algorithm>#define MAX 1007using namespace std;int t,n;double k[MAX];int main ( ){    scanf ( "%d" , &t );    int c = 1;    while ( t-- )    {        scanf ( "%d" , &n );        double sum = 0.0;        for ( int i = 1 ; i <= n ; i++ )             scanf ( "%lf" , &k[i] ) , sum += k[i];        for ( int i = 1 ; i <= n ; i++ )            scanf ( "%lf" , &k[i] );        printf ( "Case #%d: %.6f\n" , c++ , (n+1)/sum );     }}